2-debenzoyl-2-acyl taxol derivatives and methods for making same
CA 2118867 A1 · Owner: Rimoldi, John Matthew · Inventors: Gunatilaka, A.A. Leslie; Gharpure, Milind Moreshwar; Kingston, David G. I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to 2-debenzoyl-2-acyl taxol derivatives, analogues thereof and methods for making same. Compounds of the present invention include compounds having the general formula:, wherein R1 is an alkyl or substituted alkyl; R2 is selected from the group consisting of H and C(O)Ra; R3 is selected from the group consisting of H protecting, groups, Rb, and C(O)Rb; R4 is selected from the group consisting of H and C(O)Rc, and wherein Ra Rb, and Rc are, independently selected from the group consisting of alkyls, substituted alkyls, alkenyls, alkynyls aryls, and, substituted aryls; provided that Ra is other than phenyl and 3-hydroxyphenyl.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 11, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.